title: Polarization-independent coherent perfect absorption by a dipole-like metasurface.
abstract: We show that polarization-independent coherent perfect absorption can be realized in a simple dipole-like metasurface by precisely engineering the ratio between the scattering loss γ(s) and the dissipation loss γ(l). This effect can be traced to a critical condition on the scattering matrix in a dipolar picture, which requires that the scattering and dissipation losses are equivalent, i.e., γ(s) = γ(l), at the resonant frequency f(0). This work expands the capability of metasurface in getting extreme optical properties, allowing for many potential applications.
authors.forename: Ming
authors.initials: M
authors.lastname: Kang
authors.forename: Fu
authors.initials: F
authors.lastname: Liu
authors.forename: Teng-Fei
authors.initials: TF
authors.lastname: Li
authors.forename: Qing-Hua
authors.initials: QH
authors.lastname: Guo
authors.forename: Jensen
authors.initials: J
authors.lastname: Li
authors.forename: Jing
authors.initials: J
authors.lastname: Chen